Rails - Jan 2006 - Is there a concise way?

Hi,

Is there a concise/ruby way to do the following:
[Note: 1 and 2 below are not related.]

(1)
            for p in 0...@order.line_items[k].shipment_lines.length
                 shipline_qty = shipline_qty + 
@order.line_items[k].shipment_lines[p].quantity
            end

(2)
            ts = Array.new       
            for tk in s.trackings
                ts.push(tk)
            end   


Thanks.

Hi, I''m not an expert so :)


(1)
           for p in 0...@order.line_items[k].shipment_lines.length
                shipline_qty += @order.line_items[k].shipment_lines[p].quantity
           end

(2)
           ts = Array.new
           s.trackings.each { |tk| ts << tk }

Hope that helps!

2006/1/24, Mufaddal Khumri
<mkhumri@allegromedical.com>:
> Hi,
>
> Is there a concise/ruby way to do the following:
> [Note: 1 and 2 below are not related.]
>
> (1)
>             for p in 0...@order.line_items[k].shipment_lines.length
>                  shipline_qty = shipline_qty +
> @order.line_items[k].shipment_lines[p].quantity
>             end
>
> (2)
>             ts = Array.new
>             for tk in s.trackings
>                 ts.push(tk)
>             end
>
>
> Thanks.
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

Mufaddal Khumri wrote:
> Hi,
> 
> Is there a concise/ruby way to do the following:
> [Note: 1 and 2 below are not related.]
> 
> (1)
>            for p in 0...@order.line_items[k].shipment_lines.length
>                 shipline_qty = shipline_qty + 
> @order.line_items[k].shipment_lines[p].quantity
>            end
shipline_qty = @order.line_items[k].shipment_lines.inject(0){|m, line|
   m+line.quantity }
> (2)
>            ts = Array.new                 
 >            for tk in s.trackings
>                ts.push(tk)
>            end  
I don''t get it... What do you want to do with ts that you
can''t already
do with s.trackings?

-- 
Alex

On 1/24/06, Mufaddal Khumri <mkhumri@allegromedical.com>
wrote:
>
> Hi,
>
> Is there a concise/ruby way to do the following:
> [Note: 1 and 2 below are not related.]
>
> (1)
>             for p in 0...@order.line_items[k].shipment_lines.length
>                  shipline_qty = shipline_qty +
> @order.line_items[k].shipment_lines[p].quantity
>             end

I''m sure there''s a better way to do this one also but
I''m a relative Ruby
newb myself...  maybe someone else can come up with something;
maybe something like:

(0...@order.line_items[k].shipment_lines.length).each do |p| shipline_qty
+@order.line_items[k].shipment_lines[p].quantity



(2)
>             ts = Array.new
>             for tk in s.trackings
>                 ts.push(tk)
>             end
>
>
> Thanks.


ts = s.trackings.map { |tk| tk }

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